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i! FEITEL;

ROTARY BORENG DRELL APPLlcfzoN 'man crm 23t 1.918.

Patented Dec. M, 920

UNITED STATES' PATENT OFFICE.

ISAAC FEITEL, OF NEW ORLEANS, LOUISIANA, ASSIGNOR, BY IMESNE` ASSIGNMENTS,

OF ONE-HALF TO 'II-IE AMERICAN lJillLl'i XVORKS, kOF'QAURORA, ILLINOIS, A CORPO- RATION 0F ILLINOIS, 'AND, BY JUDICIAL ORDER, O'NE-lEOUIEt'lI'l` TOI-IELEN GRAD- WOI-L FEITEL, WIDOW, AND ONE-FOURTH T0 JESSIE FEITEL JAUBET, IRVIN FEITEL, ETI-IEL FEITEL HEILPERN, CHESTER FEITEL, AND GLADYS FEITEL, kHEIRS OF SAID ISAAC FEITEL, DECEASED.

:ROTARY BORING-DRILL.

Specicaton of Letters Patent.y Patented DBC. .14.1, 1920.

Application led October 23, 1918. Serial No. 259,427. I

T0 all whom it may concern:

Be it known that I, ISAAC FEITEL, a citi- Zen of the United States, and a resident of New Orleans, in the parish of Orleans and State ot Louisiana, have invented certain new and useful Improvements in Rotary Boring-Drills, of which the following is a specication, reference being had to the accompanying drawings.

This invention relates to improvements in drillingtools for boring holes in the earth for obtaining supplies of waterv or oil. It is common to employ for such purposes a type of boring tool known as a fish tail drill, which drill comprises a comparatively thin body, whose lower edge is sharpened and centrally indented so as to provide at such edge two distinct curves. The body of such fish tail type of drill is also much thicker along its side edges than at its central portion. By reason of the shape of such drill, its acting lower edge, formed as stated, wears away rapidly, and requires constant resharpening. Furthermore, by reason of such shape, it frequently will enter crevices in the bottomof the hole being formed, or-

string being suspended by flexible hoisting means, and by the' weight of the string of pipes the drill is brought into proper engagement with the bottom ofthe bore. When the drill drops into a crevice or between stones, as stated, and the rotation thereby stopped, the eHect will be to shorten up the suspension means ldue to the continued operation of the machinery which rotates the string of pipes. Such shortening up of the suspension means will, of course, draw the drill up out of the crevice in which it has lodged, but immediately upon being so drawn out, the drill will be jerked forward with great force, thus causing an irregular and undesirable operation of the drill in addition to tending to impair its acting edge.l

My invention has for its object to produce a drill which may retain the flattened body will have its lower .or effective end so shaped as to obviate any liability of the drill catching in a crevice or between stones, and thus insure a regular, steady rotation of the drill and the means by which it is suspended. I accomplish this object by providing two out# ting wings or bits standing out at an angle to the body of the drill, said wings or bits each being substantially whollyvat one 'side of the longitudinal axis of thev drill, and the two wingsextending in opposite directions, thus providing a large bearingsurface at the lower endof the drill in lieu 'of the usual sharpened edge of the lish tail type of drill. My improvements are not only adapted for incorporation in and as a part of a drill when first made, but also lend themselves to incorporation in a drill formedy from a blank produced by a used and worn drill of the fish tail type.

lInl the accompanying drawing, Figures 1 4, inclusive, represent a drill as originally made, with my improvements ,y embodied therein, Vwhile the remaining ligures show my improved drill as made-from a used and worn fish tail drill. In this drawingt' Fig. 1 is a perspectiveview of a boring drill in which isembodied my invention,

Fig. 2 is a front elevation of the same; Fig. 3 isacentral vertical the drill; j

Fig.l 4 is in the preceding figures;

Fig. 5 is a view in front elevation of an section through y n ordinary fish tail'drill after it has been worn away by use,'such view showing also a central slit formed in such worm drill preparatory to reshaping `it to embody my improvements Fig. 6 is a front elevation of a drill embodying myimprovements and constructed from a blank such as furnished by the worn fish tail drill of Fig. 5; and l n Figs. 7-,8 are edge 'and bottom views, respectively, of the'drill shown inFig. 6. f

Referring to the several figures of the drawings, and particularly to Figs.`1 t0. 4, inclusive, wherein is shown a new drilling tool as distinguished fromV a drilling tool made from a worn drill, as inthe `other gures-10 indicates the body portion of a drill, the opposite faces of which are flat and parallel. At its upper end it is providedwith an integral neck l1 which is externally screw-threaded sufficiently to enable the drill to be screwedv tightly into the lower member of a string of boring pipes. At its lower end portion the body 10 has formed therewith two wings or bits 12,.

in Fig. 4, to conform to and fit against the wall ofthe borey being formed. Each wing has its upper face formed on an' incline or gradualil curve, so that, taken a whole, each wing orbit approximates in shape an ordinary plow share. While I have termed they sharp edges 13 cutting edges it is to be understood that they are not the means relied upon for effecting a. separation or breaking off of the particles of hard material that are removed in the process of making the bore, for while such edges will act to cut ofi' and remove from the main body of hard strata any small upstanding portions that may present themselves to such edges, practically the whole of the work of making the bore tl'irough hard strata is accomplished bythe frictionalA contact of the bottom of the drill with such stratav as the drill is rotated. As the drawings show, the bottom faces of the wings or bits are perfectly flat and at a right angle to the axis of the drill. By reason of such construction broad surfaces are provided for effecting the grinding or wearing away of the hard material at the bottom of the bore in the manner stated, and whila it is true that in time such bottom surfaces will also wear away such wear will be gradual and even and thus tend to maintain edges such as 13 at all times, until, in fact, the wingsV or bits have been almost wholly worn away.' While such edges are not relied upon to effect the actual cutting away of portions from the hard material through which the bore isI being formed their maintenance in the form shown is of importance in that they will engage and scrape up the loosened material and cause it to bev deflected upward over the inclined upper faces of the wings' or bits, such loosened material being forced' into position to be so engaged bythe edges on account of the movement given it by the rotary action of the drill', assisted also bythe loosening effect of the water that is delivered at the bottom of the bore in the manner about to be described.

14 indicates a central passage extending longitudinally through the. neck of the drill, by which water under pressure that is forced down through the string of pipes will pass through the neck and out at opposite sides of the body 10A through two oppositely-disposed lat-eral openings through the faces of the drill body 10, such openings 15 communicating with the central passage 141 at points immediately below' the neck 11. Through such openings 15 water under pressure is discharged for the purpose of loosening up the material in the bore.

Turning now to the remain-ing figures, there is shown in Fig. 5 a. representation of an ordinary fish tail drill in approximately." the condition that it is brought to after a period of hard use in drilling, except that the central slot in the lower portion ofthe body of the drill is, of course, something that has been cut therein and' is not a result of wear. lin these figures l()a indicates the bod-y ofthe drill', and 11L the screw-threadcd attaching neck. 16 indicates thev slot before referred to, which slot is made central'ly of the body so as to divide the lower portion of such body into two substantially equal parts. As heretofore stated, the body of the fish tail drill, in addition to being slotted or cut centrally, as stated so as to form in eifecttwo curved edges, is constructed so as to be somewhat thicker at its edge port-ions than it is along its longitudinal axisin other words, a cross section through the body would showv at each side of the longitudinal axis as an approximately wedge shaped figure. By reason of this formation of the body, it is evident that if the portions thereof at each side of the slot 16 are turned outwardly in opposite directions and into substantial horizontal positions, there will be produced wings or bits whose upper surfaces are inclined downwardly from the outer edges of the body to the longitudinal axis thereof. lt is in this manner that l form the wings or bits, shownin Figs. 6, 7, and 8, which wings or bits are indicatcd by 12, and while the inclination of the upper surfaces of such wings or bits' is not as great as in the construction illustrated in Figs. 1 to 1, still there is inclination enough so that each wing or bit is provide-d with any edge corresponding to the edge 13 and acting upon the loosened particles of material as hereinbefore described, and the width or thickness of such' wings or bits is suflicient to enable them to provide an effective device for a very considerable length of time, although not to' so great an extent, of course, as in the case of the construction shown in Figs. 1 to 4, where the wings or bits can be Inadeof such thickness. asmav be desired. In the construction of Figs. o to 8, the water passage through which the water is received from the string of pipes is indicated by la, and the water is discharged into the bore being made through lateral passages, one of which is shown and is indicated. by 15a. The edges of a fish tail drill will be worn away in use so as to present a rounded appearance at its lower portion, approximately as represented in Fig. 5, and therefore when the wings or bits 1Qa are produced by bending the material at each side of theslot 1G, as described, they will have rounded edges, as clearly shown in Fig. 8, each of which will be the aro ofy a circle that will conform to and fit against the cylindrical `wall of the bore being formed. Of course, if the wear on the fish tail drill should not be sufficient to produce the required perfect curve, as will of course be frequently the case, the desired curvature can be given by a mechanical grinding operation, and thereby the proper fit of the Wings rn the cylindrical bore be secured, as in the case of the structure made in the first place from fresh stock, as indicated in Figs. l to 4.

By reason of the construction of bit described-whether made from new stock or from a worn fish tail drill- I provide a. con struction that has a great advantage over the fish tail type in that it is free from liability of catching in crevices in the bottom of the bore or between heavy stones embedded therein, and therefore it is capable of being continuously and smoothly operated. While my improved drill is free from the objections incident to the use of the ordinary fish tail drill, it retains the desirable feature of body construction of such fish tail type of drill in that its body is of comparatively narrow width, and hence leaves a large space opposite its fiat faces for the passage of water and the material that has been loosened as hereinbefore described.

What I claim as my invention and desire to secure by Letters Patent, is

l. A well-boring drill comprising a body portion of materially less thickness than width and two bits at the lower end of the body, said bits projecting from opposite faces of the body and at opposite sides of said faces, the lower faces of the bits being substantially perpendicular to the said body to present a grinding face to the material at the bottom of the bore being formed.

2. A well-boring drill comprising a body portion of materially less thickness than width and two bits at the lower end of the body, said bits projecting from opposite faces of the body and at opposite sides of said faces, the lower faces of the bits being substantially perpendicular to the said body and their upper faces being inclined downwardly from the side edges of the body toward the longitudinal center of the body to form a cutting edge on each bit.

3. A well-boring drill comprising a body portion of materially less thickness than width and twogbits at the lower end of the body, said bits projecting from opposite faces of the body and at opposite sides o-f said faces, said bits each having a smooth lower surface approximately perpendicular to the longitudinal axisfof the body, an inclined upper surface and a curved periphery.

f 4. A well-boring drill comprising a body of materially less thickness than width and having its lower portion divided centrally by a slot extending from its lower edge,

said lower divided portion being turned outwardly in opposite directions and at substantially right angles to the 'body' to 'form cutting bits, said bits having flat under surfaces and inclined upper surfaces.

5. A well-'boring drilljcomprlsing a body d of materially less thickness than width having its lower portion divided centrally by a slot extending from its lower edge, said lower divided portion being turned outwardly in opposite directions and at substantially right angles to the body to form cutting bits, said bits having flat under surfaces and inclined upper surfaces, and having their peripheries curved to conform to the wall of a hole being bored by the drill.

6. A rotary boring tool having wings that extend forward in the direction of rotation, said wings having flat bottom surfaces adapted by frictional contact with the material through which a bore is being formed by the rotation of the tool to disintegrate such material.

7. A rotary boring tool vadapted to be operated by a string of pipes whose weight rests thereon, said tool having wings that extend forward in the direction ofrotation, said wings having fiat bottom surfaces adapted by frictional contact with the material through which a bore is being formed by the rotation of the tool to disintegrate such material, said tool having means for receiving a supply of water from said string of boring pipes to permit such water to pass to the bottom of the bore and wash out the disintegrated material.

8. A rotary boring tool adapted to be operated by a string of pipeswhose weight rests thereon, ysaid tool having wings that extend forwardV in the direction of rotation, said wings having flat y,bottom surfaces adapted by frictional contact with the material through which a bore is being formed by the Arotation of the tool to disintegrate such material, said tool having means for receiving a vsupply of kwater from said string Y disintegrated material, and said wings havat right angles to the axis of rotation of the tool.

10. A rotary well boring tool having a iiat bottom face disposed at right angles to the axis of rotation of the tool and comprising a plurality of sections each of which is defined by a substantially radial line at its forward edge in the direction of rotation of the tool.

1l. A rotary well boring tool having its bottom face in the form of a plurality of sectors and substantially flat and disposed at right angles to the axis of rotation of the tool, each ofy the sectors having an inclined upper face sloping upward from the forward edge of the sector in the direction of rotation of the tool.

l2. A well boring tool adapted to be rotated under heavy downward pressure, said toolhaving a flat bottom face disposed at right angles to the axis of rotation of the tool and comprising a plurality of sections the forward edge of each of which in the direction of rotation of the tool is defined by a line extending substantially from the axis of the tool to the periphery, said tool being adapted by the extreme friction and corresponding heat to break upv and disintegrate the material through which the bore is progressing. hi

. S ISAAC X FEITEL.

mark Witnesses:

IBVIN FEITEL, HELEN F EITEL, GLADYS BEITEL. 

